Highlighting the Potency of Biosurfactants Produced by Pseudomonas Strains as Anti-Legionella Agents

Table 2

Determination of the chemical nature of active compounds produced by Pseudomonas strains.

Pseudomonas strains	Drop collapse assay	Ethyl acetate extract activity	Coloration by anthrone	Coloration by ninhydrin
P. aeruginosa 8H	+	+	+	-
P. aeruginosa CHA	+	+	+	-
P. aeruginosa UCBPP-PA14	+	+	+	-
P. cepacia 4512	-	-	-	-
P. sp DSS73	+	+	-	+
P. fluorescens MFAD21c	+	+	-	+
P. fluorescens MFAH4a	+	+	-	+
P. fluorescens MFAO2	+	+	-	+
P. fluorescens MFE01	+	+	-	+
P. fluorescens PfA7b	+	+	-	+
P. fulva 1324	-	-	-	-
P. fulva B6	-	-	-	-
P. fulva B8	-	-	-	-
P. libanensis 4000	-	-	-	-
P. otitidis 4014	+	+	+	-
P. putida 1243	-	-	-	-
P. putida 1312	-	-	-	-
P. putida MFAF88	+	+	-	+
P. putida MFAK14	-	-	-	-
P. syringae MFAA66a	+	+	-	+
P. syringae MFAE88	+	+	-	+

+: three independent assays give a positive result.
-: three independent assays give a negative result.